Lamp



H. A. DouabAs.

Maf; 27, 1923.,.-

LAMP. FILED APR- 4, 1921..

liao-QW l 55 the `structure of Patented Mar. 27, 1923.

HARRY A. DOUGLAS, or BiaoNsoN, MICHIGAN.

LAMP.

` Application inea april 4,

vTo all lwhom t may concern:

Be it known that I, HARRY A. DOUGLAS, citizen of the United States,residing at Bronson, in the county of Branch and State of ',Michigamhaveinvented a certain new and useful Improvement in Lamps, of which thefollowing is a ull,`clear, concise, and exact description.

My invention relates to enclosedlamps and is of particular service inconnection with enclosed incandescent electric lamps,` though theinvention is notto be thus lim-sv ited. Inone embodiment of theinvention a light transmitting lamp enclosing casing is so constructedand arranged with relation to an incandescent lamp structure enclosedthereby as to constitute an automobile fender lamp. y

'In carrying outmy invention the light transmitting lamp enclosingcasing has a portion, preferably the base portion, with which the lampstructure is separably as` sembled, this lampv structure beingpreferably provided with an upwardly projecting extension which isaccessible from the top of the casing toenable the separation of thelamp structure and its casing. After the vlamp structure is uncoupled`it may be withdrawn through an opening that is preferably provided inthe top portion of said casing. f f

I will explain my inventionfully by reference to the accompanyingdrawing in which Fig. 1 is a view, mainly in sectional elevation, of thepreferred embodiment of the invention; Fig. 2 is a view taken generallyon line 2-2 of Fig. 1; Fig. 3 is a view, partially in section andpartially in elevationillustrating a part of a modified incandescentlamp structure; and Fig. 4 is a sectional view on line 4 4 of Fig. 3.

Like parts are indicated by similar characters of reference throughoutthe diiiierent figures. y

The lamp structure shown, which` is enclosed in accordance with myinvention, is inclusive of a lamp mounting that is preferably acylindrical metallic shell 1 having f a contact carrier 2 assembledtherewith within the bore thereof in any suitable way or by any suitablemeans as, for example, the outwardly spring pressed assembling pin 3ycarried by said contact carrier and engaging a registeringropening insaid shell. igs. `1 and 2 two fixed 192i. serial Nd. 458,559.

contacts 4 are assembled with said carrier and are engageable at theirlower ends by upwardly spring pressed contacts 5 provided upon aninsulating plug 6 separably assembled with and within the enclosing`casing as will more iully hereinafter yappear. This plug carries two'terminals 7 with which the circuit wires Sare connected,

`these terminalsbeing hollow at theirupper ends `toreceiver thelowerportions of the contacts 5 and' to contain the springs 9 which press thecontacts upwardly into engagementwith the contacts 4. These `lattercontacts 4 are hollowT in their upper portions to receive they lowerportions or" the `contacts-10f`and[to receive the springs 11 that pressthe contacts 10` upwardly against l the contacts 12, 18 which are `uponthe bottom ot the base 14 kof the incandescent lamp bulb 14. Thisincandescent lamp bulb base is provided with bayonet projections 15separably received within bayonet channels 16 formed in thevshell 1. g

The lamp structure shownin igs. 3 and 4 is generally similar to thatshown in Figs. 1 and 2, but modified to constitute a` so-. called singlepole lamp, similar parts being given similar characters of reference. InFig. 3 the metallic shell 1 `is in grounded connection with one terminalof the source of current and yengages a metallic plate 17, that replacesone ott the contacts 4, and also engages the metallic sheath upon thelamp base 14, this sheath constituting one ter minal ot' theincandescent`lamp filament.

`The other terminal 13 of the incandescent lamp Vtllanient engages thesingle and centrally located contact 10 that projects from the metallicspring barrel 4 connected withy a contact 42 positioned to be` engagedby one of the contacts 5. y

In both forms of lamp structure illustrated, the `metallic shell'lisprovidedwith bayonet channels 18 eachhaving two seats 19, 20 toreceivebayonet projections l21 carl ried by the casing and preferablythe tu bular base portion 22 ot the casing 23, these i bayonetprojections extending laterally into the bore oi such tubular base. Theupwardly pressing springs 9 maintainthe shell 1 in assembly with said'pins and tlierebyin assembly with the lamp ycasing 23, these springsbeing positioned by the plug held in assembly with the base of ythelampl casing by the threaded annular cap24 that .with an opening throughwhich the shell` may be vn'iianipulated andthe lamp structure withdrawnor inserted. This opening is desirably the vbore of the tubular topcasing continuation 27 that is co-aXial with the shell l, the bore beingsutliciently7 large to permitof the passage of the lamp structuretherethrough. This opening in the lamp casing is provided with a closurecap 28 formed with an annular groove 29 in which said tubularcontinuation is` slidably received. The shell l has an upward extensionor yoke 30 which is united with said cap. By suitably pressing upon andturning the cap the shell is turned to switch the lamp into or out ofcircuit. lf the cap be turned suliciently to bring the longitudinalportions of the bayonet channels 18` into register with the bayonetprojections 21, the cap may be lifted to remove the lamp strucvturewhich was inserted by a reversal of the movements necessary'to effectits removal.

The light is emitted through the openings in theyoke 30k and suitablelight transmitting openings in the lamp casing. In the form ot theinvention illustrated glass lenses 3l are provided in the lamp casing ondiametrically opposite sides of the lamp bulb 14, the'balance of thelamp casing being opaque. A. lamp tothe passage of light in two oppositedirectionsto adapt it for use as a :tender lamp. Any'suitable means maybe employed for assembling the lamp casing with the tender 32 or othermounting.` The means-shown includesan annular nut 38 threaded upon theexterior of the lamp base and serv-ing to clamp the mounting 3'2 and aVrubber gasket 34 between the nut and the shoulder 35 upon the lampcasing. When the device is used upona fender, one lens 3l is uncoloredand'V faces forwardly, and the other lens is colored red' and facesrearwardly.

While l have herein shown and particularly described the preferredembodiment of my invention l do not wish' to be limited to the precisedetails of construction shown as changes may` readily'be made withoutdeparting fromthespirit of my invention, but having as new and desireto,- secure by.` Letters Patent the following v thus equipped is limitedthus' described my inventionl claimV l. The combination with ai lighttransmitting laiiip casing having an opening therein; of a shell thatmay be passed through said opening and which may be turned, said `casingand'shell being in bayonet 'projec- 2. The combination with a lighttransmiti-v ting lamp casing having an opening therein; of a mountingthat ina-y be passed through said opening and which may be turned. saidcasingand mounting. heilig in bayonet proj ection4 and channelengagement- -apart from said opening` through whichfthe mounting may beadjusted, the channel *formation having two bayonet seats to hold themounting in either of twov positions` to which it may be turned; anelectric lamp carried by the mounting and enclosed by said casing;complemental lcontacts one beingfconnected with the lighting element ofthe lamp and theother Vbeing carried bythe casing, these contacts beingengagedorseparated according yto the position into which said mountingisturned;` and a closure. for the opening in the casing and connectedwith the mounting. y

3. The combination with a light transmitting lamp casing having anopening therein; of a shell that be passed through said opening andenclosed by the casing and which-may be turned, said casing and shellbeingin bayonet projection and channel `engagement apartv from saidopeningV through whieh'thel shell may be adjustech'the channelforinationhaving two bayonetV seats to hold thel shell ineither of twopositions to which it vmay be turned; an electric lamp carried by the,l'shell and enclosed by said casing; and coinpleinental Acontacts onebeing connected with the lighting element of thelanip and the otherbeing carried by the casing, these contacts being engaged or separatedaccording to the position into which said shell is turned.`

t.. The combination with a light transmitting lamp casing having. anopening therein; of amounting that maybe passed through said'opening andenclosedby the casing and justed, the channel formation having twobayonet seats to hold the mounting in either of two positions to whichit may be turned; an electric lamp carried by the mounting and enclosedby said casing; and Complemental contacts one being connected with thelighting element of the lamp and the other being carried by the casing,these contacts being engaged or separated according to vthe positioninto which said mounting is turned. (10

n witness whereof, I hereunto subscribe my name this 30th day of MarchA. D., 1921.

yHARRY A. DoUGLAs; f 1

